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Ticket #2109 (new defect)

Opened 13 years ago

Last modified 13 years ago

Poor performance with AR5006X

Reported by: DarkMan Assigned to:
Priority: major Milestone:
Component: madwifi: other Version: trunk
Keywords: AR5006X performance Cc: spam@jezgra.org
Patch is attached: 0 Pending: 0

Description

I've found exact svn version where things got wrong.. here's my try_log

3456 - 2,3 mb/s 3720 - 2,0 mb/s 3730 - 2,0 mb/s 3750 - 2,0 mb/s 3752 - 2,0 mb/s 3753 - 300kb/s ---> break point 3755 - 300kb/s 1760 - 300kb/s 3780 - 300kb/s

so it's clear now that you did something with those timings I read in log .. ack or something.

I'm using this adapter like this (wep hidden)

ath0      IEEE 802.11a  ESSID:"www.si-wifi.org"  Nickname:""
          Mode:Managed  Frequency:5.5 GHz  Access Point: 00:0E:8E:00:00:73
          Bit Rate=54 Mb/s   Tx-Power:16 dBm   Sensitivity=1/1
          Retry:off   RTS thr:off   Fragment thr:off
          Encryption key:0000-0000-0000-0000-0000-0000-00   Security mode:restricted
          Power Management:off
          Link Quality=32/70  Signal level=-60 dBm  Noise level=-92 dBm
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:0   Missed beacon:

Change History

09/01/08 09:24:33 changed by D

Hm formating of log went bad.. here's another try

3456 - 2,3 mb/s
3720 - 2,0 mb/s
3730 - 2,0 mb/s
3750 - 2,0 mb/s
3752 - 2,0 mb/s
3753 - 300kb/s ---> break point
3755 - 300kb/s
1760 - 300kb/s
3780 - 300kb/s

09/23/08 21:35:02 changed by georg

This is actually a known issue. I wrote a bit about the background, but there seems nobody available who understands enough of the timings to make a proper fix.

Reverting the value to "slottime * 2 + 8" fixes 802.11a again, but it seems not to be required for 802.11b/g. As this is inconsistend, I'm not going to commit it to svn.

09/23/08 22:01:27 changed by DarkMan

Thanx for update georg. I sure hope it will get some new formula these days.. it's pitty that 802.11a is pretty much unusable and doesn't keep up with svn.

10/26/08 19:02:25 changed by anonymous

I reversed back changes in svn 3753 back to latest svn and it works fine now.

10/27/08 23:47:29 changed by PHM

I am using the same chipset 5413 but problem is that Rx packets in ath0 interface always remains 0. wifi0 receives packets but ath0 does not. I tested in adhoc mode, BSSID is correctly communicated between nodes but no traffic is transferred further.

Mine is default 0.9.4 release and the problem still exists, which is the svn where this problem is not happening and things are working fine?